K형 강관접합부의 보강효과에 관한 실험적 연구

김갑순,한병찬,성수용,김우범,정수영 충남대학교 산업기술연구소 2000 산업기술연구논문집 Vol.15 No.2

In current design, the strength formula for a Gusset-Tube connections stiffened with rib-plate is proposed only in the limited case because of its complexity of the behavior. So in this study, experimental study and finite element analysis were performed to investigate the behavior and strength of a Gusset-Tube connections stiffened with rib-plate. Because of limitations in loading capacity, the specimens were fabricated with 1/3 scale of full size. Tensile coupon tests and stub column tests were also carried out. Of primary interest here are the stiffened effect of Gusset-Tube connections considering lateral force ratio, gusset plate length, eccentricity, stiffened length. Consequently, we intend to obtain accumulated database to propose practical strength equation and suggest rational reinforcing method of Gusset-tube connection.

sympathomimetic Amines의 新生家兎腸片에 미치는 影響

鄭瑀甲 全南大醫大 1970 전남의대학술지 Vol.7 No.2

K형 강관접합부의 편심접합에 관한 실험적 연구

김갑순,신의균,김우범,정수영 충남대학교 산업기술연구소 2000 산업기술연구논문집 Vol.15 No.1

A finite element analysis and experimental study were performed to investigate the behavior and strength of a connection of tubular steel member considering slenderness ratio and eccentricity. Primary interest here are ultimate strength of connections having eccentricity. In comparison with the current design standard according to which the gravity axes of the main and branch pipes coincide with each other, the inner eccentric joint where the gravity axes of the branch pipes are shifted to the gusset plate side can reduce the gusset plate size. However, in the eccentric joint where the gravity axes do not coincide, the bending moment that acts on the main pipe due to eccentricity causes a problem. As a result, in cases where the slenderness ratio is 40 or less, the buckling strength of the inner eccentric joint was similar to that of a joint without eccentricity. Therefore the possibility of use of inner eccentricity connection to reduce the gusset plate size has been verified.

選好多樣性을 考慮한 버스 서비스 評價模型에 關한 硏究

김갑수,권대우,김상황 嶺南大學校 工業技術硏究所 2004 工業技術硏究所論文集 Vol.32 No.2

In order to overcome the weakness of previous studies an the average-based customer satisfaction, bus service evaluation technique was proposed in this study. A perceived service(i.e. perception of service quality, mobility, transfer and economy) and stated preference survey were conducted to investigate passenger’ consciousness toward bus service. The analysis results from study are as follows; The likelihood ratio of evaluation model for bus service established in mixed multinomial logit model is 0.259 and the hit ratio is 62.1 %. It was found that the ratio is far better than the model established by multinomial logit model. Standard deviations of some variables like accessing time, travel time, comfort of driving, information sign, 1ow floor bus and standing-bus have significant level of 5 %, which indicates the reflection of user' heterogeneity.

일반화시간을 이용한 대중교통 서비스 평가에 관한 연구

김갑수,권대우 영남대학교 공업기술연구소 2000 工業技術硏究所論文集 Vol.28 No.2

This paper suggested generalized time model and method for service evaluation of public transportation using it. Generalized time model was established using equivalent time coefficient and VOT. The results of this study are as follows: 1) In scoring of service, generally bus satisfactory degree is lower than subway's. In case of bus, satisfactory degree of access time is the biggest and travel time, wait time, fare in order. In case of subway, satisfactory degree of travel time is the biggest and fare, access time in order. 2) In order to know a burden of each travel mode, equivalent time coefficient was estimated as following. Single transfer 16.19, walk 2.61, wait 1.87, parking 1.75, subway 0.76, car 0.66. Therefore it is found that single transfer is 16 times than bus and subway and car are lower than bus. It was appeared that these have theoretical and practical propriety in view of each personal characteristics. But, it is need to consider parking and car equivalent time coefficient of under 19 age. 3) It was appeared that estimated value of time is reasonable and the result is 17.27(\/min). Generally there was a large deviation according to personal characteristics, specially driver licence and car being or not. 4) Evaluation of current service, desired service, satisfactory service and dissatisfactory service in case study district is done using generalized time model which was established using equivalent time coefficient and value of time. Availability of generalized time model would be shown to compare and evaluate service between different modes, bus routes or areas with different service, service after improvement and before improvement. Also in the future, generalized time may be used to establish another service evaluation model of public transportation. It is needed to study wait time for subway and to consider trip purpose in establishing equivalent time coefficient and value of time.

통행시간절약가치 추정을 위한 QR 모형에 관한 연구 : 자가 운전자의 선호의식을 고려하여

김갑수,권대우 영남대학교 환경문제연구소 2000 環境硏究 Vol.20 No.1

통행시간절약가치는 교통계획, 교통정책 및 교통투자사업의 사업타당성 검토시 필수요소이다. 시간절약이란 것이 실제 거래되지 않는 것이므로, 행동데이타와 의식데이타를 이용하여 시간의 행동가치를 측정하기 위한 간접적인 다양한 계측방법이 사용되어 왔다. 그러나 대개 실용적 이유로 비집계 로짓형 모형을 많이 사용하여 왔으나, 선택지들이 상호 독립적이라는 모형의 가정은 종종 한정적인 경우가 많다. 본 연구는 실험적인 연구로서, 자가용승용차 이용자의 유료도로 동행에 대한 선호의식을 이용하여, 그들의 통행시간절약가치를 추정하기 위해 로짓모형을 포함한 3가지 QR 모형을 구축하였으며, 그 결과물을 이용하여 최적 모형을 구하기 위해 모형간을 비교 분석 하였다. 분석 결과 세 모형 모두가 양호한 적합도를 보였으며, 통행시간절약가치는 약 2,400원/시간/대로 나타났다. 또한 통행단축시간보다 통행요금에 대한 탄력성이 큰 것으로 나타났다. 모형간의 비교분석결과는 적중률을 제외한 잔차제곱합, 추정확출잔차제곱합, 로그우도함수 값 등에 있어서 로짓 모형이 다소 우위를 차지하는 것으로 나타났으나, 전체적으로 차이가 있다고 보기는 어려운 것으로 나타났다. The purpose of this study is to establish three QR (Qualitative Response) models for evaluating vague of travel time saving and to find out best model by comparing these models using outcomes of model formulation. The results of this study is as follows. First, value of travel time saving is about 2,400 won/hour in all three models. Second, the three models show that the goodness-of-fit is satisfactory. Third, the results of comparing models show that logit model is best in SSR (Sum of Squared Residuals), SSR weighted by estimated probabilities and value of log likelihood function without hit ratio, but the difference between each models is very small.

옥수수(Zea mays L.)根毛細胞의 電子顯微鏡的 硏究

金宇甲,金恩洙 순천향대학교 1982 논문집 Vol.5 No.2

옥수수 근모세포를 전자 현미경으로 관찰하여 아래와 같은 결과를 얻었다. 1. 핵은 세포의 기부에 존재하고 인이 매우 발달하였다. 2. 세포질에는 미토콘드리아, 활면소포체, 조면 소포체, 리보소옴, microbody들이 주로 나타났으며 색소체와 dictyosome은 관찰하지 못하였다. 3. 액포는 많이 관찰되었는데 이는 원형질막이 세포질안으로 부분 함입이 일어나서 다소포상구조를 이루는 plasmalemmasome과 세포질의 막계인 소포에서 유래되어지는 것으로 보이는 다층막성구조인 lomasome등에 의하여 형성된다고 믿어진다. 4. acid phosphatase 활성은 나타나지 않았으나 ruthenium red처리에 있어서는 세포벽에 활성이 나타났다. 특히 세포벽 외연부에 그 활성이 강한 바 이는 mucilage의 존재를 암시한다. Corn root hairs were examined by electron microscopy. Quite frequently cytoplasmic structures such as a mitochondrion, endoplasmic reticulum and ribosomes have been observed in these cells. Mitochondria having cristae were oval or oblong in forms. Ribosomes were present freely, but most of them forming polysomes. R-ER were relatively abundant in the central region of the cells and same of them formed pear shaped feature. Microbodies bounded by limiting membrane were about 1.5∼6.5m in diameter. Various vacuoles and vesicles were also founded in these cells. 1t is considered that invaginations of the plasma membrane may continue to increase in size and typically expanded into the central region, ultimately forming a large vacuole. During the vacuolation, it seemed that multivesicular or multilamellar structures gradually differentiated and fused with each other. Although acid phosphatase activity didn't occur in these cells, the reaction of ruthenium red appeared on the outer surface of the cell wall, suggesting that mucilage exist in that region.

소아의 만성 설사

정우갑 중앙대부설한국의과학연구소 1975 한국의과학 Vol.7 No.9

도약ㆍ단거리 선수들의 하퇴 삼두근에 대한 등속성 상대근력에 관한 연구

이강우,장갑석,홍순모 한국체육대학교 1996 敎養敎育硏究所 論文集 Vol.- No.1

The purpose of this research was to measure and evaluate relative strength of left and right triceps surae muscle of excellent jumpers and sprinters using Cybex-Ⅱ System. The subjects of this research were 5 men and women of 100-m sprinter, 5 men and women of 400-m sprinter, 5 men and women of high jumper, 5 men and women of triple jumper, and 5 men and women of long distanceer, respectively. The method of the experiment was exercised centering around peantar flexion and dorsiflexion of triceps surae muscle using Cybex-Ⅱ System. the procedures of the experiment were as follows: After falling on one's face in an upright position on the upper-body exercise and testion table, the parts of gluteus maximus and femur(thigh bone) were fastened with fixed belt. After sticking and fastenning available foot with fixed belt to the sole of a foot on a springboard equipped with the anklebone and dynamoneter, the light exercise was tried without discomforts in exerting strength. The guage was fixed at 0˚ the ankle joint so that the strength can be produced correctly, torque guage and cybex data reduction computer were controlled. After setting at 30˚/sec, the strength was exerted maximally. This velocity was the velocity that can measure maximal strength of triceps surae muscle centering around the ankle joint. After exerting the strength of 3 to 5 times, the best peak torque of those was selected and produced.

Paraquat 중독환자의 초기검사로서 sodium dithionite를 이용한 소변내 paraquat검출의 임상적 의의

윤갑준,임경수,이진웅,김영식,이부수,박덕우,김선만,이강현,황성오,안무업 대한응급의학회 1995 대한응급의학회지 Vol.6 No.1

Background : Mortality from paraquat intoxication depends upon plasma paraquat concentration. To know the severity of paraquat intoxication is important for directing therapeutic modality and predicting prognosis. Sodium dithionite test for urinary paraquat provides an easy and simple method to determine the severity of paraquat intoxication in emergency department. purpose : To determine whether the result urinary paraquat test by sodium dithionite can predict outcome in patients with paraquat intoxication in emergency department. Subjects : 48 patients(male 31, female 17, mean age 37 years) who had exposure to paraquat and presented within 24 hours after exposure. Result : Thirty five patients were positive in paraquat urine test and thirteen patients were negative. Clinical manifestations were more severe in positive patients than in negatives. Complication was much more in positives than in negatives. 28 of 35 patients(80%) in positives and 2 of 13 patients(15%) in negatives died. Conclusion : Positive test for urinary paraquat is associated with high mortality and morbidity from paraquat intoxication, and qualitative test for urinary paraquat by sodium dithionite is an useful method to determine the severity of paraquat intoxication in emergency department.